A very nice idea $1 White wants to overprotect his center, while discouraging the opponent's queenside play before launching a kingside assault.
13... h7h6  14. c3e2 Where's this knight going $2 The d4-outpost seems like a perfect candidate. But not the only one... 14... e7c6 Giri plays solidly. 15. c2c3  15... f8e7 